700 MHz to 1000 MHz RF Vector Modulator Data Sheet AD8340 FEATURES FUNCTIONAL BLOCK DIAGRAM VPRF QBBP QBBM VPS2 Cartesian amplitude and phase modulation 700 MHz to 1.0 GHz frequency range 90 Continuous magnitude control of 2 dB to 32 dB RFOP RFIP Continuous phase control of 0 to 360 RFIM Output third-order intercept 24 dBm RFOM Output 1 dB compression point 11 dBm 0 Output noise floor 149 dBm/Hz at full gain Adjustable modulation bandwidth up to 230 MHz CMOP IBBP IBBM DSOP Fast output power disable Figure 1. 4.75 V to 5.25 V single-supply voltage APPLICATIONS RF PA linearization/RF predistortion Amplitude and phase modulation Variable attenuators and phase shifters CDMA2000, GSM/EDGE linear power amplifiers Smart antennas GENERAL DESCRIPTION The AD8340 vector modulator performs arbitrary amplitude Both the RF inputs and outputs can be used differentially or and phase modulation of an RF signal. Because the RF signal single-ended and must be ac-coupled. The RF input and output path is linear, the original modulation is preserved. This part impedances are nominally 50 over the operating frequency can be used as a general-purpose RF modulator, a variable range. The DSOP pin allows the output stage to be disabled attenuator/phase shifter, or a remodulator. The amplitude can quickly to protect subsequent stages from overdrive. The AD8340 operates off supply voltages from 4.75 V to 5.25 V be controlled from a maximum of 2 dB to less than 32 dB, and the phase can be shifted continuously over the entire 360 while consuming approximately 130 mA. range. For maximum gain, the AD8340 delivers an OP1dB The AD8340 is fabricated using the Analog Devices, Inc. of 11 dBm, an OIP3 of 24 dBm, and an output noise floor of proprietary, high performance 25 GHz SOI complementary 149 dBm/Hz, independent of phase. It operates over a fre- bipolar IC process. It is available in a 24-lead RoHS-compliant quency range of 700 MHz to 1.0 GHz. LFCSP package and operates over a 40C to +85C tempera- The baseband inputs in Cartesian I and Q format control the ture range. Evaluation boards are available. amplitude and phase modulation imposed on the RF input signal. Both I and Q inputs are dc-coupled with a 500 mV differential full-scale range. The maximum modulation band- width is 230 MHz, which can be reduced by adding external capacitors to limit the noise bandwidth on the control lines. Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20042014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 04699-001AD8340 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Noise and Distortion .................................................................. 11 Applications ....................................................................................... 1 Gain and Phase Accuracy .......................................................... 11 Functional Block Diagram .............................................................. 1 RF Frequency Range .................................................................. 11 General Description ......................................................................... 1 Applications Information .............................................................. 12 Revision History ............................................................................... 2 Using the AD8340 ...................................................................... 12 Specifications ..................................................................................... 3 RF Input and Matching ............................................................. 12 Absolute Maximum Ratings ............................................................ 4 RF Output and Matching .......................................................... 13 ESD Caution .................................................................................. 4 Driving the I-Q Baseband Controls ......................................... 13 Pin Configuration and Function Descriptions ............................. 5 Interfacing to High Speed DACs .............................................. 14 Typical Performance Characteristics ............................................. 6 CDMA2000 Application ........................................................... 14 Theory of Operation ...................................................................... 10 Evaluation Board ............................................................................ 16 RF Quadrature Generator ......................................................... 10 Schematic and Artwork ............................................................. 18 I-Q Attenuators and Baseband Amplifiers .............................. 11 Outline Dimensions ....................................................................... 20 Output Amplifier ........................................................................ 11 Ordering Guide .......................................................................... 20 REVISION HISTORY 3/14Rev. B to Rev. C Added Exposed Pad Notation, Figure 2 and Table 3 ................... 5 Updated Outline Dimensions ....................................................... 20 Changes to Ordering Guide .......................................................... 20 8/07Rev. A to Rev B Replaced Pin Configuration and Function Descriptions Section ........................................................................ 5 Changes to Figure 30 ...................................................................... 12 Changes to Figure 39 ...................................................................... 18 7/07Rev. 0 to Rev. A Replaced Pin Configuration and Function Descriptions Section ........................................................................ 5 Changes to Ordering Guide .......................................................... 20 6/04Revision 0: Initial Version Rev. C Page 2 of 20